content: /* ===========================================================
   * JFreeChart : a free chart library for the Java(tm) platform
   * ===========================================================
   *
   * (C) Copyright 2000-2011, by Object Refinery Limited and Contributors.
   *
   * Project Info:  http://www.jfree.org/jfreechart/index.html
   *
   * This library is free software; you can redistribute it and/or modify it
   * under the terms of the GNU Lesser General Public License as published by
   * the Free Software Foundation; either version 2.1 of the License, or
   * (at your option) any later version.
   *
   * This library is distributed in the hope that it will be useful, but
   * WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
   * or FITNESS FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public
   * License for more details.
   *
   * You should have received a copy of the GNU Lesser General Public
   * License along with this library; if not, write to the Free Software
   * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301,
   * USA.
   *
   * [Oracle and Java are registered trademarks of Oracle and/or its affiliates. 
   * Other names may be trademarks of their respective owners.]
   *
   * ----------------
   * WindDataset.java
   * ----------------
   * (C) Copyright 2001-2008, by Achilleus Mantzios and Contributors.
   *
   * Original Author:  Achilleus Mantzios;
   * Contributor(s):   David Gilbert (for Object Refinery Limited);
   *
   * Changes
   * -------
   * 06-Feb-2002 : Version 1, based on code contributed by Achilleus
   *               Mantzios (DG);
   *
   */
  
  package org.jfree.data.xy;
  
  /**
   * Interface for a dataset that supplies wind intensity and direction values
   * observed at various points in time.
   */
  public interface WindDataset extends XYDataset {
  
      /**
       * Returns the wind direction (should be in the range 0 to 12,
       * corresponding to the positions on an upside-down clock face).
       *
       * @param series  the series (in the range <code>0</code> to
       *     <code>getSeriesCount() - 1</code>).
       * @param item  the item (in the range <code>0</code> to
       *     <code>getItemCount(series) - 1</code>).
       *
       * @return The wind direction.
       */
      public Number getWindDirection(int series, int item);
  
      /**
       * Returns the wind force on the Beaufort scale (0 to 12).  See:
       * <p>
       * http://en.wikipedia.org/wiki/Beaufort_scale
       *
       * @param series  the series (in the range <code>0</code> to
       *     <code>getSeriesCount() - 1</code>).
       * @param item  the item (in the range <code>0</code> to
       *     <code>getItemCount(series) - 1</code>).
       *
       * @return The wind force.
       */
      public Number getWindForce(int series, int item);
  
  }
  